1. how long must candidates for senator have been citizens of the united states?
a at least four years
b at least two years
c at least six years
od at least nine years
answer is 9 years

The candidates of the senator should be D. nine years (At least).

The senate of United States includes the upper chamber which is Congress of United States along with the Representatives House; and the lower chamber comprises of legislature of the United States.

The Article 1, section 3 of the constitution states the basic three requirements for the senator candidate are:

basic principles: federalism, separation of powers, checks and balances, judicial review, representative democracy, limited government, rule of law, individual rights and responsibilities, consent of the governed, majority rule, popular sovereignty, equal protection.

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation: